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85 , 87 , 91 Octane ? -----E85 +/- ?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Shawn08Tac, Feb 7, 2011.

  1. Feb 7, 2011 at 2:42 PM
    #1
    Shawn08Tac

    Shawn08Tac [OP] New Member

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    I have always driven a sports car mostly with superchargers so I have always used the highest octane I could find normally being 91 here in CO.
    Now that I have the V6 in my 2008 TRD Sport do I still need to run 91 or would 87 work with out taking away any longevity from the engine? Any other huge negatives? Gas is high and getting higher so just looking at cutting back where I can, but it is not worth it if is going to cause even small problems. Also any thoughts on converting to E85?
     
  2. Feb 7, 2011 at 6:15 PM
    #2
    supralight

    supralight Well-Known Member

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    87 is ok per manual, and you cannot run E85, also per manual
     
  3. Feb 7, 2011 at 6:16 PM
    #3
    skistoy

    skistoy Make mine a Double!

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    usually go with the 87
     
  4. Feb 7, 2011 at 6:23 PM
    #4
    ktmrider

    ktmrider Senior Member

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    easy solution slap on a supercharger get the x1 and a high boost pulley and some ethonal injectors and run E85.


    But otherwise 87 will be fine
     
  5. Feb 7, 2011 at 6:30 PM
    #5
    Sant0s

    Sant0s Well-Known Member

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    on my ols 4.0l i always ran 91, i tried 87 and 89 and i noticed a diff in mpg and overall response from the truck and when i towed even more so.
    E85 is a great thing i run it in 2 of my cars but theres a lot involved with ensuring having a full system that can support the extra fuel requirements needed for E85 plus the need for the tuning needed to take advantage of the ignition/fuel tables.
    i bet $ a stock 4.0L tuned on E85 will put around 330-350hp
     
  6. Feb 7, 2011 at 6:39 PM
    #6
    dually

    dually Low and slow

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    Not as many as the 98..
    Supercharge, than the conversion to E85 would be worth it!
     
  7. Feb 7, 2011 at 6:52 PM
    #7
    crf69

    crf69 scraping my emblems off my plasti-dip

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    ummm yeah
    with ya on that......
     
  8. Feb 7, 2011 at 7:09 PM
    #8
    Sant0s

    Sant0s Well-Known Member

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    ive felt and noticed the diff, remember this is a 10:1 comp motor and heres something too take it as you will
    str8 from WIKI



    The 1GR-FE is the 4.0 L (3956 cc) version, designed for longitudinal mounting in RWD and 4WD pickup applications. It has a 94 mm bore and a stroke of 95 mm. Output is 236 hp (176 kW) at 5200 rpm with 266 lb·ft (361 N·m) of torque at 4000 rpm on 87 octane, and 239 hp (178 kW) at 5200 rpm with 278 lb·ft (377 N·m) at 3700 rpm on 91 octane. This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression ratio of 10.0:1. An updated version of this engine features Dual VVT-i, increasing output to 254 hp (189 kW) and 270 lb·ft (366 N·m) on 87 octane and 285 hp (213 kW) and 289 lb·ft (392 N·m) on 91 octane
     
  9. Feb 7, 2011 at 7:15 PM
    #9
    Jdevine80

    Jdevine80 Member

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    Regular 85 is fine too in Colorado (anywhere there is higher altitude) but not E85 as others said. I run regular 85 in mine with no problem.
     
  10. Feb 7, 2011 at 7:29 PM
    #10
    Sant0s

    Sant0s Well-Known Member

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    HP isnt what you feel but the TQ, but you do not see a graph you you could be seeing a lot of usable torque that you wont get with lower oct. fuel.
     
  11. Feb 7, 2011 at 11:51 PM
    #11
    Doug2000

    Doug2000 Well-Known Member

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    I was told by a friend that build race motors, that if it's high compression or boosted, then you go with a higher Octane.
     
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